A new book called "The Immigration Disaster' ('De Immigratieramp'), will be coming out in the Netherlands Monday. The book was written by Sietse Fritsma, who worked by the IND, the Dutch immigration service, from 2000 to 2006. In his book Fritsma cites out of secret IND files to show a failing immigration policy and non-functioning IND. The chaos he found by the IND was so great that in 2006 it motivated him to become a parliament member for Geert Wilders' Party for Freedom.
According to secret files of the IND, between 1977 and 2006 there were Moroccans and Turks who abused family reunification laws, bringing in more than 8 'partners' to the Netherlands, mostly from the same village.
After three years, once the partner got the right to a residence permit, the relationship was broken off and the story began again: the ex-wife and her ex-husband both brought in new 'partners', most from the same community, to the Netherlands.
It also turns out that through the years thousands of criminal foreigners had gotten residence permits through family reunification laws.
As of February 15, 2005 foreign criminals who want to join their Dutch partner do not get an automatic residence permit, but until then several thousands of foreigners with a criminal record (assault, drug trade, violence) got residence permits in the Netherlands.
Source: Telegraaf (Dutch), h/t Nieuw Religieus Peil